2MgO·2B_2O_3·MgCl_2·14H_2O在60℃水中的溶解及相转化动力学研究  

Studies on the Kinetics of Dissolution and Transformation of\=2MgO2B2O3MgCl214H2O in Water at 60

作　　者：刘志宏[1,2] 夏树屏[1,2] 高世扬[1,2] 

机构地区：[1]陕西师范大学化学系 [2]中国科学院盐湖研究所二部

出　　处：《高等学校化学学报》1999年第2期186-189,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：用动力学方法研究了２ＭｇＯ·２Ｂ２Ｏ３·ＭｇＣｌ２·１４Ｈ２Ｏ在６０℃水中的溶解及相转化过程．通过对不同时间取出液相的化学分析及不同阶段分离出固相所作鉴定结果表明：该复盐呈不同步溶解，中间产物是ＭｇＯ·Ｂ２Ｏ３·４Ｈ２Ｏ和Ｍｇ（ＯＨ）２，最终转化产物是柱硼镁石（ＭｇＯ·Ｂ２Ｏ３·３Ｈ２Ｏ）．提出了溶解及相转化机理。The kinetic of dissolution and transformation process of 2MgO2B2O3MgCl214H2O in water at 60 was studied. The solution samples were taken at different time for chemical analysis.The solid phase at different stages was separated and identified.The experimental results show that 2MgO2B2O3MgCl214H2O dissolved incongruently in water. The midproduct is MgOB2O34H2O and Mg(OH)2. The final inversion product is pinnoite, \{MgO\}B2O33H2O. The mechanism of dissolution and transformation was proposed and discussed. The kinetic equations of dissolution and crystallization were obtained.\=

关 键 词：氯柱硼镁石 溶解 相转化 动力学 柱硼镁石 

分 类 号：O614.22[理学—无机化学]